How to Replace Thermostat 07-14 Chevrolet Suburban
Difficulty: Intermediate · About 90 min · Chevrolet Suburban
Replace the thermostat on a 2007–2014 Chevrolet Suburban, removing the belt and upper hose for access, then refilling and checking the cooling system after the engine cools.
Tools you will need
- 15mm Wrench
- Socket Extensions
- Torque Wrench
- 8mm Socket
- 10mm Socket
- Ratchet
Parts and supplies
- Engine thermostat
- Thermostat gasket
- Approved engine coolant
Steps
Prepare the engine and clear access
Work only with the engine completely cool and relieve cooling system pressure. Remove the engine cover and intake snorkel, disconnect the upper hose, then use the 15 mm wrench to release belt tension and remove the belt from the pulley.
Remove the thermostat
Move the hose clamp and disconnect the thermostat housing hose. Remove the housing bolts and lift the housing away, noting the old thermostat orientation before taking it out.
Install the new thermostat
Fit the new gasket to the replacement thermostat and seat it in the housing in the correct orientation. Reinstall the housing and tighten its bolts to the vehicle's specification, then reconnect the hose and clamp.
Restore the belt and intake parts
Route the serpentine belt according to the underhood diagram and release the tensioner onto it. Reinstall the intake snorkel, hoses, clamps, and engine cover.
Refill and check the cooling system
Fill with the specified coolant and bleed the system using the vehicle's procedure. With the cap secured as directed, run the engine while monitoring temperature and checking for leaks; let it cool fully before rechecking the level.
Check your vehicle’s repair manual for exact specifications and fit.